Effect of Soil Temperature and Moisture on Glyphosate and Photoassimilate Distribution in Quackgrass (<i>Agropyron repens</i>)

Klevorn, T. B.; Wyse, Donald L.

doi:10.1017/s0043174500059208

Cited by 26 publications

(15 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…; Lauridson et al . ; Klevorn & Wyse ; Waldecker & Wyse ; de Ruiter & Meinen ). Maintaining similar absorption levels of 2,4‐D in drought‐stressed plants had been documented in previous studies (Hauser ; Basler et al .…”

Section: Resultsmentioning

confidence: 99%

Waterhemp (Amaranthus tuberculatus) control under drought stress with 2,4‐dichlorophenoxyacetic acid and glyphosate

Skelton

Riechers

2016

Weed Biology and Management

View full text Add to dashboard Cite

Waterhemp (Amaranthus tuberculatus) is a common and troublesome weed in cropping systems throughout the United States. With the potential for future periods of low rainfall or drought, the need for improved weed control under drought stress is necessary. Drought stress typically reduces herbicide efficacy by reducing the foliar uptake of herbicides and their translocation. The objectives of this research were to determine the efficacy of 2,4-dichlorophenoxyacetic acid (2,4-D) and glyphosate, applied alone or when tank-mixed, on waterhemp under varying levels of drought stress, the effect of the timing of drought stress in relation to herbicide application and the absorption and translocation of each herbicide in drought-stressed waterhemp. At reduced herbicide rates, 2,4-D had a greater level of control of waterhemp under drought stress, compared to glyphosate. The level of herbicide efficacy was lower when the amount of water that was applied to the plants was reduced. The level of waterhemp control was greatest when drought stress occurred before the herbicide application and when the plants were watered to saturation after the application, compared to when drought stress occurred after the herbicide application or restricted watering levels occurred throughout the entire study. Glyphosate absorption and translocation were reduced in the drought-stressed plants, but 2,4-D absorption and translocation were not altered. The absence of a reduction in 2,4-D translocation in the drought-stressed weeds has not been previously reported. Applying herbicides prior to a rainfall event could increase the weed control level, even if the weed is stressed. Determining how and why 2,4-D absorption and translocation levels, compared to those of glyphosate, are unaffected by drought stress in waterhemp can aid in improving the control of drought-stressed weeds with other postemergence herbicides.

show abstract

Section: Resultsmentioning

confidence: 99%

Waterhemp (Amaranthus tuberculatus) control under drought stress with 2,4‐dichlorophenoxyacetic acid and glyphosate

Skelton

Riechers

2016

Weed Biology and Management

View full text Add to dashboard Cite

show abstract

“…The influence of temperature on herbicide translocation and phytotoxicity varied (Blair et al 1983, Coupland 1986, Devine et al 1983, Grafstorm and Nalewaja 1988, Kells et al 1984, Klevorn and Wyse 1984, Morrison 1983, Nalewaja and Woznica 1988, Smeda and Putnam 1990, Wills 1984, Wills and McWhorter 1983. There have been limited studies on the effects of light intensity on herbicide performance and underlying physiologic processes.…”

mentioning

confidence: 99%

Influence of temperature and light intensity on absorption, translocation, and phytotoxicity of fenoxaprop-ethyl and imazamethabenz-methyl in Avena fatua

Xie

Hsiao

1996

J Plant Growth Regul

View full text Add to dashboard Cite

The absorption and translocation of fenoxaprop-ethyl and imazamethabenz-methyl were investigated in wild oat (Avena fatua L.) plants grown under different temperature and light intensity conditions by using ~4C tracer techniques. The phytotoxicity of both herbicides, applied as individual droplets, was also determined under similar environments. The absorption of fenoxaprop-ethyl and imazamethabenz-methyl was increased by high temperature (30/20~ and to a lesser extent by 70% shading; low temperature (10/5~ had limited effect on the absorption. The basipetal translocation of fenoxaprop-ethyl was not affected by high temperature, and the increase in imazamethabenz-methyl translocation at high temperature was likely the result of the increased absorption. Low temperature decreased total translocation and translocation efficiency in both fenoxaprop-ethyl and imazamethabenz-methyl. Low light intensity tended to reduce the efficiency of basipetal translocation of both herbicides. Fenoxaprop-ethyl phytotoxicity was reduced by high temperature but not by low temperature. Temperature had little effect on imazamethabenz-methyl effectiveness. Under 70% shading, the phytotoxicity of both herbicides was enhanced.

show abstract

“…Applications in 2006 were on moisture-stressed vegetation and very dry soils, which were likely detrimental to plant growth and herbicide uptake and translocation. Low soil moisture was previously shown to reduce leaf uptake of glyphosate and to reduce translocation of glyphosate to rhizome buds in quackgrass (Klevorn and Wyse 1984). Even though frequency of OWB was reduced the year after application for most treatments compared with the noherbicide control, some new seedlings of OWB emerged the next year in the absence of well-established OWB plants.…”

Section: Discussionmentioning

confidence: 93%

Rate and Timing of Glyphosate Application to Control Caucasian Old World Bluestem (Bothriochloa bladhii)

Harmoney

Stahlman

Geier

et al. 2010

Invasive plant sci. manag.

View full text Add to dashboard Cite

Caucasian Old World bluestem (OWB) has escaped into native rangelands and could have unknown effects on distribution, utilization, growth, and reproduction of native plant and animal species. This trial was established to determine the rate and timing of glyphosate application that will provide the greatest OWB suppression. Treatments included glyphosate applied early at the five-leaf stage of growth with 1.12, 2.24, or 3.36 kg glyphosate ai ha−1(1, 2, or 3 lb ai ac−1), sequential application with an early glyphosate application of 1.12, 2.24, or 3.36 kg ha−1followed by a second application 8 wk later of either 1.12 or 2.24 kg ha−1, and a late-only application of 1.12, 2.24, or 3.36 kg ha−1. Sequential glyphosate applications with at least one of the early or late applications being 2.24 kg ha−1or more reduced OWB frequencies from over 87% to below 30% each year. During a moist year, all sequential application treatments reduced OWB frequency to 12% or less. Frequency of OWB the year after application was directly related (r2= 0.91) to the total amount of glyphosate applied during dry conditions. Seed heads were absent or nearly absent in all sequential application treatments, with the exception of glyphosate at 1.12 kg ha−1applied early and late during the dry season. Sequential application of glyphosate that includes one treatment either early or late of 2.24 or 3.36 kg ha−1appears to be the most effective treatment to reduce established OWB during dry years. During years of adequate moisture, a single late application of 2.24 or 3.36 kg ha−1or sequential applications with 1.12 kg ha−1at each application is as adequate as sequential applications with greater rates for reducing OWB frequency and achieving OWB control.

show abstract

Effect of Soil Temperature and Moisture on Glyphosate and Photoassimilate Distribution in Quackgrass (Agropyron repens)

Cited by 26 publications

References 25 publications

Waterhemp (Amaranthus tuberculatus) control under drought stress with 2,4‐dichlorophenoxyacetic acid and glyphosate

Waterhemp (Amaranthus tuberculatus) control under drought stress with 2,4‐dichlorophenoxyacetic acid and glyphosate

Influence of temperature and light intensity on absorption, translocation, and phytotoxicity of fenoxaprop-ethyl and imazamethabenz-methyl in Avena fatua

Rate and Timing of Glyphosate Application to Control Caucasian Old World Bluestem (Bothriochloa bladhii)

Contact Info

Product

Resources

About